All tools

Format, beautify, and validate JSON online. Free, fast, runs entirely in your browser.

Validate JSON syntax online with clear error messages and line numbers. Free and private.

Encode and decode Base64 strings online. UTF-8 safe, browser-only — your data never leaves your device.

Decode JWT tokens and inspect header, payload, and signature. Runs locally — your tokens stay private.

Format SQL queries with consistent indentation and keyword casing. Supports MySQL, PostgreSQL, and standard SQL.

Test regular expressions against sample text. Highlight matches, inspect groups, and toggle flags.

Generate cryptographically random UUID v4 identifiers — single or bulk, instantly.

Convert between Unix timestamps and human-readable dates. Supports seconds, milliseconds, and ISO 8601.

Compress JPG, PNG, and WebP images directly in your browser. Tune quality, see savings instantly.

Resize images by pixels or percentage. Keep aspect ratio, batch-friendly, runs locally.

Convert PNG images to WebP for smaller files and faster pages. Adjustable quality, runs locally.

Convert JPG images to PNG for lossless quality and transparency-ready files. Browser-only.

Count words, characters, sentences, paragraphs, and reading time for any text. Free and instant.

Convert text between upper case, lower case, title case, sentence case, camelCase, snake_case, and kebab-case.

Remove duplicate lines from any text. Optional case-insensitive matching and sorting.

Generate Lorem Ipsum placeholder text by paragraphs, sentences, or words. Copy-ready dummy content.

Calculate monthly payments, total interest, and full amortization schedule for any loan.

Estimate your monthly mortgage payment including principal, interest, property tax, and insurance (PITI).

See how investments grow over time with compound interest. Supports periodic contributions.

Convert salary between hourly, weekly, monthly, and yearly. Quick comparison across pay frequencies.